webkit.mm

很牛的GUI源码wxWidgets-2.8.0.zip 可在多种平台下运行.

    MacPostControlCreate(pos, size);
    HIViewSetVisible( m_peer->GetControlRef(), true );
    [m_webView setHidden:false];
#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_3
    if ( UMAGetSystemVersion() >= 0x1030 )
        HIViewChangeFeatures( m_peer->GetControlRef() , kHIViewIsOpaque , 0 ) ;
#endif
    InstallControlEventHandler( m_peer->GetControlRef() , GetwxWebKitCtrlEventHandlerUPP(),
        GetEventTypeCount(eventList), eventList, this,
        (EventHandlerRef *)&m_webKitCtrlEventHandler);

#endif

    // Register event listener interfaces
    MyFrameLoadMonitor* myFrameLoadMonitor = [[MyFrameLoadMonitor alloc] initWithWxWindow: this];
    [m_webView setFrameLoadDelegate:myFrameLoadMonitor];
    
    // this is used to veto page loads, etc.
    MyPolicyDelegate* myPolicyDelegate = [[MyPolicyDelegate alloc] initWithWxWindow: this];
    [m_webView setPolicyDelegate:myPolicyDelegate];
    
    LoadURL(m_currentURL);
    return true;
}

wxWebKitCtrl::~wxWebKitCtrl()
{

}

// ----------------------------------------------------------------------------
// public methods
// ----------------------------------------------------------------------------

void wxWebKitCtrl::LoadURL(const wxString &url)
{
    if( !m_webView )
        return;

    [[m_webView mainFrame] loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:wxNSStringWithWxString(url)]]];

    m_currentURL = url;
}

bool wxWebKitCtrl::CanGoBack(){
    if ( !m_webView )
        return false;

    return [m_webView canGoBack];
}

bool wxWebKitCtrl::CanGoForward(){
    if ( !m_webView )
        return false;

    return [m_webView canGoForward];
}

bool wxWebKitCtrl::GoBack(){
    if ( !m_webView )
        return false;

    bool result = [(WebView*)m_webView goBack];
    return result;
}

bool wxWebKitCtrl::GoForward(){
    if ( !m_webView )
        return false;

    bool result = [(WebView*)m_webView goForward];
    return result;
}

void wxWebKitCtrl::Reload(){
    if ( !m_webView )
        return;

    [[m_webView mainFrame] reload];
}

void wxWebKitCtrl::Stop(){
    if ( !m_webView )
        return;

    [[m_webView mainFrame] stopLoading];
}

bool wxWebKitCtrl::CanGetPageSource(){
    if ( !m_webView )
        return false;

    WebDataSource* dataSource = [[m_webView mainFrame] dataSource];
    return ( [[dataSource representation] canProvideDocumentSource] );
}

wxString wxWebKitCtrl::GetPageSource(){

    if (CanGetPageSource()){
        WebDataSource* dataSource = [[m_webView mainFrame] dataSource];
        return wxStringWithNSString( [[dataSource representation] documentSource] );
    }

    return wxEmptyString;
}

wxString wxWebKitCtrl::GetSelection(){
    if ( !m_webView )
        return wxEmptyString;
        
    NSString* selectedText = [[m_webView selectedDOMRange] toString];
    return wxStringWithNSString( selectedText );
}

bool wxWebKitCtrl::CanIncreaseTextSize(){
    if ( !m_webView )
        return false;
        
    if ([m_webView canMakeTextLarger])
        return true;
    else
        return false;
}

void wxWebKitCtrl::IncreaseTextSize(){
    if ( !m_webView )
        return;
        
    if (CanIncreaseTextSize())
        [m_webView makeTextLarger:(WebView*)m_webView];
}

bool wxWebKitCtrl::CanDecreaseTextSize(){
    if ( !m_webView )
        return false;
        
    if ([m_webView canMakeTextSmaller])
        return true;
    else
        return false;
}

void wxWebKitCtrl::DecreaseTextSize(){
    if ( !m_webView )
        return;
        
    if (CanDecreaseTextSize())
        [m_webView makeTextSmaller:(WebView*)m_webView];
}

void wxWebKitCtrl::SetPageSource(const wxString& source, const wxString& baseUrl){
    if ( !m_webView )
        return;

    [[m_webView mainFrame] loadHTMLString:(NSString*)wxNSStringWithWxString( source ) baseURL:[NSURL URLWithString:wxNSStringWithWxString( baseUrl )]];

}

void wxWebKitCtrl::Print(bool showPrompt){
    if ( !m_webView )
        return;
    
    id view = [[[m_webView mainFrame] frameView] documentView]; 
    NSPrintOperation *op = [NSPrintOperation printOperationWithView:view printInfo: [NSPrintInfo sharedPrintInfo]]; 
    if (showPrompt){
        [op setShowsPrintPanel: showPrompt];
        // in my tests, the progress bar always freezes and it stops the whole print operation.
        // do not turn this to true unless there is a workaround for the bug.
        [op setShowsProgressPanel: false];
    }
    // Print it. 
    [op runOperation]; 
}

void wxWebKitCtrl::MakeEditable(bool enable){
    if ( !m_webView )
        return;

    [m_webView setEditable:enable ];
}

bool wxWebKitCtrl::IsEditable(){
    if ( !m_webView )
        return false;

    return [m_webView isEditable];
}

int wxWebKitCtrl::GetScrollPos(){
    id result = [[m_webView windowScriptObject] evaluateWebScript:@"document.body.scrollTop"];
    return [result intValue];
}   

void wxWebKitCtrl::SetScrollPos(int pos){
    if ( !m_webView )
        return;
        
    wxString javascript; 
    javascript.Printf(wxT("document.body.scrollTop = %d;"), pos);
    [[m_webView windowScriptObject] evaluateWebScript:(NSString*)wxNSStringWithWxString( javascript )];
}

wxString wxWebKitCtrl::RunScript(const wxString& javascript){
    if ( !m_webView )
        return wxEmptyString;    
        
    id result = [[m_webView windowScriptObject] evaluateWebScript:(NSString*)wxNSStringWithWxString( javascript )];
    
    NSString* resultAsString;
    wxString resultAsWxString = wxEmptyString;
    NSString* className = NSStringFromClass([result class]);
    if ([className isEqualToString:@"NSCFNumber"])
        resultAsString = [NSString stringWithFormat:@"%@", result];
    else if ([className isEqualToString:@"NSCFString"])
        resultAsString = result;
    else if ([className isEqualToString:@"NSCFBoolean"]){
        if ([result boolValue])
            resultAsString = @"true";
        else
            resultAsString = @"false";
    }
    else if ([className isEqualToString:@"WebScriptObject"])
        resultAsString = [result stringRepresentation];
    else
        fprintf(stderr, "wxWebKitCtrl::RunScript - Unexpected return type: %s!\n", [className UTF8String]);

    resultAsWxString = wxStringWithNSString( resultAsString );
    return resultAsWxString;
}

void wxWebKitCtrl::OnSize(wxSizeEvent &event){
    // This is a nasty hack because WebKit seems to lose its position when it is embedded
    // in a control that is not itself the content view for a TLW.
    // I put it in OnSize because these calcs are not perfect, and in fact are basically
    // guesses based on reverse engineering, so it's best to give people the option of
    // overriding OnSize with their own calcs if need be.
    // I also left some test debugging print statements as a convenience if a(nother)
    // problem crops up.

    wxWindow* tlw = MacGetTopLevelWindow();

    NSRect frame = [m_webView frame];
    NSRect bounds = [m_webView bounds];
    
#if DEBUG_WEBKIT_SIZING
    fprintf(stderr,"Carbon window x=%d, y=%d, width=%d, height=%d\n", GetPosition().x, GetPosition().y, GetSize().x, GetSize().y);
    fprintf(stderr, "Cocoa window frame x=%G, y=%G, width=%G, height=%G\n", frame.origin.x, frame.origin.y, frame.size.width, frame.size.height);
    fprintf(stderr, "Cocoa window bounds x=%G, y=%G, width=%G, height=%G\n", bounds.origin.x, bounds.origin.y, bounds.size.width, bounds.size.height);
#endif

    // This must be the case that Apple tested with, because well, in this one case
    // we don't need to do anything! It just works. ;)
    if (GetParent() == tlw){
        return;
    }

    // since we no longer use parent coordinates, we always want 0,0.
    int x = 0; 
    int y = 0;
    
    HIRect rect;
    rect.origin.x = x;
    rect.origin.y = y;

#if DEBUG_WEBKIT_SIZING
    printf("Before conversion, origin is: x = %d, y = %d\n", x, y);
#endif

    // NB: In most cases, when calling HIViewConvertRect, what people want is to use GetRootControl(),
    // and this tripped me up at first. But in fact, what we want is the root view, because we need to
    // make the y origin relative to the very top of the window, not its contents, since we later flip 
    // the y coordinate for Cocoa. 
    HIViewConvertRect (&rect, m_peer->GetControlRef(), 
                                HIViewGetRoot( (WindowRef) MacGetTopLevelWindowRef() ) );

    x = (int)rect.origin.x;
    y = (int)rect.origin.y;

#if DEBUG_WEBKIT_SIZING
    printf("Moving Cocoa frame origin to: x = %d, y = %d\n", x, y);
#endif

    if (tlw){
        //flip the y coordinate to convert to Cocoa coordinates
        y = tlw->GetSize().y - ((GetSize().y) + y);
    }

#if DEBUG_WEBKIT_SIZING
    printf("y = %d after flipping value\n", y);
#endif

    frame.origin.x = x;
    frame.origin.y = y;
    [m_webView setFrame:frame];
   
    if (IsShown())
        [(WebView*)m_webView display];
    event.Skip();
}

void wxWebKitCtrl::MacVisibilityChanged(){
    bool isHidden = !IsControlVisible( m_peer->GetControlRef());
    if (!isHidden)
        [(WebView*)m_webView display];

    [m_webView setHidden:isHidden];
}

//------------------------------------------------------------
// Listener interfaces
//------------------------------------------------------------

// NB: I'm still tracking this down, but it appears the Cocoa window
// still has these events fired on it while the Carbon control is being
// destroyed. Therefore, we must be careful to check both the existence
// of the Carbon control and the event handler before firing events.

@implementation MyFrameLoadMonitor

- initWithWxWindow: (wxWebKitCtrl*)inWindow
{
    [super init];
    webKitWindow = inWindow;    // non retained
    return self;
}

- (void)webView:(WebView *)sender didStartProvisionalLoadForFrame:(WebFrame *)frame
{
    if (webKitWindow && frame == [sender mainFrame]){
        NSString *url = [[[[frame provisionalDataSource] request] URL] absoluteString];
        wxWebKitStateChangedEvent thisEvent(webKitWindow);
        thisEvent.SetState(wxWEBKIT_STATE_NEGOTIATING);
        thisEvent.SetURL( wxStringWithNSString( url ) );
        if (webKitWindow->GetEventHandler())
            webKitWindow->GetEventHandler()->ProcessEvent( thisEvent );
    }
}

- (void)webView:(WebView *)sender didCommitLoadForFrame:(WebFrame *)frame
{
    if (webKitWindow && frame == [sender mainFrame]){
        NSString *url = [[[[frame dataSource] request] URL] absoluteString];
        wxWebKitStateChangedEvent thisEvent(webKitWindow);
        thisEvent.SetState(wxWEBKIT_STATE_TRANSFERRING);
        thisEvent.SetURL( wxStringWithNSString( url ) );
        if (webKitWindow->GetEventHandler())
            webKitWindow->GetEventHandler()->ProcessEvent( thisEvent );
    }
}

- (void)webView:(WebView *)sender didFinishLoadForFrame:(WebFrame *)frame
{
    if (webKitWindow && frame == [sender mainFrame]){
        NSString *url = [[[[frame dataSource] request] URL] absoluteString];
        wxWebKitStateChangedEvent thisEvent(webKitWindow);
        thisEvent.SetState(wxWEBKIT_STATE_STOP);
        thisEvent.SetURL( wxStringWithNSString( url ) );
        if (webKitWindow->GetEventHandler())
            webKitWindow->GetEventHandler()->ProcessEvent( thisEvent );
    }
}

- (void)webView:(WebView *)sender didFailLoadWithError:(NSError*) error forFrame:(WebFrame *)frame
{
    if (webKitWindow && frame == [sender mainFrame]){
        NSString *url = [[[[frame dataSource] request] URL] absoluteString];
        wxWebKitStateChangedEvent thisEvent(webKitWindow);
        thisEvent.SetState(wxWEBKIT_STATE_FAILED);
        thisEvent.SetURL( wxStringWithNSString( url ) );
        if (webKitWindow->GetEventHandler())
            webKitWindow->GetEventHandler()->ProcessEvent( thisEvent );
    }
}

- (void)webView:(WebView *)sender didFailProvisionalLoadWithError:(NSError*) error forFrame:(WebFrame *)frame
{
    if (webKitWindow && frame == [sender mainFrame]){
        NSString *url = [[[[frame provisionalDataSource] request] URL] absoluteString];
        wxWebKitStateChangedEvent thisEvent(webKitWindow);
        thisEvent.SetState(wxWEBKIT_STATE_FAILED);
        thisEvent.SetURL( wxStringWithNSString( url ) );
        if (webKitWindow->GetEventHandler())
            webKitWindow->GetEventHandler()->ProcessEvent( thisEvent );
    }
}

- (void)webView:(WebView *)sender didReceiveTitle:(NSString *)title forFrame:(WebFrame *)frame
{
    if (webKitWindow && frame == [sender mainFrame]){
        webKitWindow->SetPageTitle(wxStringWithNSString( title ));
    }
}
@end

@implementation MyPolicyDelegate

- initWithWxWindow: (wxWebKitCtrl*)inWindow
{
    [super init];
    webKitWindow = inWindow;    // non retained
    return self;
}

- (void)webView:(WebView *)sender decidePolicyForNavigationAction:(NSDictionary *)actionInformation request:(NSURLRequest *)request frame:(WebFrame *)frame decisionListener:(id<WebPolicyDecisionListener>)listener
{
    wxWebKitBeforeLoadEvent thisEvent(webKitWindow);

    // Get the navigation type. 
    NSNumber *n = [actionInformation objectForKey:WebActionNavigationTypeKey]; 
    int actionType = [n intValue];
    thisEvent.SetNavigationType( wxNavTypeFromWebNavType(actionType) );
    
    NSString *url = [[request URL] absoluteString];
    thisEvent.SetURL( wxStringWithNSString( url ) );
    
    if (webKitWindow && webKitWindow->GetEventHandler())
        webKitWindow->GetEventHandler()->ProcessEvent(thisEvent);

	if (thisEvent.IsCancelled())
        [listener ignore];
    else
        [listener use];
}

@end

#endif //wxUSE_WEBKIT